1÷(1-20%)-1,
=1÷0.8-1,
=1.25-1,
=25%.
答:价格应提高25%.
一台彩电先降价20%,现在要涨价百分之几才能以原价出售?
一台彩电先降价20%,现在要涨价百分之几才能以原价出售?
数学人气:522 ℃时间:2019-09-21 06:42:09
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